Can kuhli loaches live with blue gouramis?

Verdict
Yes

Yes. Kuhli loaches and blue gouramis get along in the same tank. Both are fine at 75–82°F. Plan on at least 30 gal.

Kuhli loachKuhli loach75–86°F · pH 5.5–7 Blue gouramiBlue gourami72–82°F · pH 6–8

Why it works

Water side by side

55°60°65°70°75°80°85°90°Both: 75–82°Kuhli loach 75–86°Blue gourami 72–82°
The green band is the temperature range both can live in.
456789Both: 6–7Kuhli loach 5.5–7Blue gourami 6–8
The green band is the pH both tolerate.

Size to scale

Kuhli loach · 3.5 inBlue gourami · 5 in0"1"2"3"4"5"6"
Adult length in an aquarium. A fish can swallow anything that fits in its mouth, roughly a third to half its own length for predators.

Care at a glance

Kuhli loachBlue gourami
Temperature75–86 °F72–82 °F
pH5.5–76–8
Adult size3.5 in5.0 in
Minimum tank20 gal30 gal
TemperamentPeacefulSemi-aggressive
Swims atBottomTop
GroupGroups of 6+Alone or in pairs
DietOmnivoreOmnivore

Better tank mates for kuhli loaches

All kuhli loach tank mates

Better tank mates for blue gouramis

All blue gourami tank mates

Questions

Can kuhli loaches live with blue gouramis?

Yes. Kuhli loaches and blue gouramis get along in the same tank. Both are fine at 75–82°F. Plan on at least 30 gal.

What temperature suits both kuhli loaches and blue gouramis?

75–82 °F. Kuhli loaches need 75–86 °F, blue gouramis need 72–82 °F.

What size tank do kuhli loaches and blue gouramis need together?

At least 30 gal, set by the blue gourami. Add space for each extra fish.